fix: suppress vitest-pool-workers debug noise and hanging process

- Pre-declare Node.js compatibility flags in miniflare config to
  prevent [vpw:debug] messages during test runs
- Use --no-file-parallelism to fix dangling handle causing
  "close timed out" warning on exit

vitest.config.js

@@ -8,6 +8,15 @@ export default defineConfig({
       miniflare: {
         // Override remote KV with local-only for tests
         kvNamespaces: ["claude_status"],
+        // Pre-add flags so vitest-pool-workers doesn't emit debug noise
+        compatibilityFlags: [
+          "enable_nodejs_tty_module",
+          "enable_nodejs_fs_module",
+          "enable_nodejs_http_modules",
+          "enable_nodejs_perf_hooks_module",
+          "enable_nodejs_v8_module",
+          "enable_nodejs_process_v2",
+        ],
       },
     }),
   ],